Feeder for boring and turning machines.



w. c. FARNUNI.

FEEDER FOR BORING AND TURNING MACHINES.

APPLICATION FILED lU LY25. I9l3.

Patented Dec. 14, 1915.

4 SHEETS-SHEET I.

W. C. FARNUM.

FEEDER FOR BORING AND TURNING MACHlNES. APPLICATION man JULY 25. 1913.

LEMfim- E Patented Dec. 14., 1915.

4 SHEETS-SHEET 2.

wmuww@ wag,

.W. C. FARNUIVI. FEEDER'FdN BORING AND TURNING MACHINES.

APPLICATION FILED JULYZ5. I913.

PatentedDec. 14, 1915. f

4 SHEETS-SHEET 3- wwmwwma" W. C. FARNUIVI.

vFEEDER FOR BORING AND TURNING MACHINES.

APPLICATION FILED JULY 25. 1913.

1 .,lM,%?@.. Patented Dec. 14, 1915.

4 SHEETS SHEET 4.

JMWWMWW Maine saaras r aaranr marina WILLIAM C. JFARN'UM, OFWINCHENJDON, MASSACHUSETTS, ASSIG-NOR OF ONE-HALF T0 HENRY E. COWDREYAND CHARLES F. COWDBEY, 0F JFITCHBUJELG, MASSACHUSETTS.

FEEDER FOR BORING AND TURNING MACHINES.

Specification of Letters Patent.

Patented Dec. 11, 1915.

Application filed July 25, 1913. Serial No. 781,113.

0 all whom it may concern:

Be it known that I, VVILLIAM C. FARNLM, a citizen of the United States,residing at Winchendon, county of Worcester and State of Massachusetts,have invented an Improvement in Feeders for Boring and Turning Machines,of which the following description, in connection with the accompanyingdrawings, is a specification, like letters on the drawings representinglike parts.

The invention to be hereinafter described relates to wood boring andturning machines wherein wooden blanks are bored and the exteriorsurface turned and finished in the formation of the completed product,such as handles-and the like; and more particularly the presentinvention relates to means for feeding the blanks and transferring themfrom station to station for treatment.

The aims and purposes of the present invention are to provide feedingmeans 1n a machine of the above general type which shall be simple inconstruction and effective and economical in operation, and wherein theparts and their association shall be such that wooden pieces may be fedin succession to be bored and then to a position where they may beturned where they shall be released.

These and other objects of .the present invention will best be madeclear from the following description and accompanying drawings of oneform of means for carrying the invention into practical effect, it beingunderstood that in details the various parts and their relations may bemodified within the true scope of the invention, which is definitelypointed out and defined by the claims.

In the drawings :Figure 1 is a side View of a boring and turning machinefor making handles, such for instance, as are used for manipulating handtools, said machine being provided with the feeding means of the presentinvention; Fig. 2 is a central crosssection of the machine shown by Fig.1, showing the hopper or trough operating mechanism and the movable camfor operating the jaws of the feeder; Fig. 3 is an enlarged detachedview of the feeder showing details constituting a good practical form'ofthe present invention, with parts broken away; and Fig. 4 is an enlargedsection on the line 41, Fig. 3.

The drawings herewith show the present invention associated with aboring and turnmg machine of the ty shown and described in a priorapplication filed by me January 10, 1912, Serial No. 670,398, andreference may be had thereto for full disclosure of the boringand-turning operatIOIIS but it is to be understood that the invention isnot restricted to such type of machlne.

Referring to Fig. 1, the machine frame may be of any approved orappropriate form and, as in the application referred to, comprisessupporting end frames 1, sustainlng the machine bed 2. Journaled in themain frame is the main driving shaft 3 which may be driven in anysuitable manner from a convenient source of power, and operatlvelyconnected thereto are the side cam shafts 4, Fig. 1, substantially asand for the purpose as fully described in said prior application.

The feeding device of the present invention contemplates the adaptationfor use in a machine for simultaneously boring and turning differentblanks, that is to say, while one blank is being bored another is beingturned and finished, and to this end the appropriate boring heads andturning heads are preferably arranged in pairs alongside of each other,so that when a blank has been bored, it may be conveniently transferredto the turning heads and the exterior turned and finished. In theillustrated form of the invention, it is shown in connection with onepair of boring heads and one pair of turning heads arranged side byside, but obviously a greater number of pairs of boring and turningheads may be conveniently assembled in operative relation with feedingdevices of the present invention within the true scope thereof.

The machine bed 2 at oppositeside por-.

tions is provided with suitable ways 5, Fig.

1, on which slide the boring and tuining head stocks 6 and 7. Theseways, only one of which is shown in Fig. 1, may be formed by upwardlyprojecting inclined portions which are engaged by downwardly convergingportions 8 of the head stock frames, substantially as set forth in fullin said prior application. The head stocks for the boring and turningheads may be of any appropriate character and be operated in the fitwell-known way for properly boring and then turning the bored blanks,and for convenience they are herein shown of the type set forth in saidprior application.

Rising from the main frame are the standards 9 for supporting part ofthe feeder for the blanks, said standards, as shown, being preferablydisposed between the longitudinal axis ofthe boring and turning heads 6and 7, Fig. 1, so that the blanks may be first delivered to the boringstation as will more fully appear.

Mounted in a suitable bearing in a standard 9 is the feed shaft 10,Figs. 1 and 4, carrying the blank engagingmeans which takes a blank froma source of supply and delivers it first to the boring head where theblank is held from rotation until properly bored, and then carries it tothe turning station, where, after the turning centers have properlyengaged the blank, the said feeding means releases the blank that it maybe turned. I

It is appropriate at this time to describe the character of the feeder,the preferred structure of jaws, and their operating means,

as best indicated by Figs. 3 and 4. The jaws are mounted in pairs uponpivotal points carried by a jaw carrier rotatable with the feeder shaft10, and said jaws are appropriately opened and closed at proper times totake a blank and deliver it successively to the boring and turningstations, as above indicated. As one means for carrying this featureinto practical efiect, the shaft 10, Figs. 3 and 4, has splined orotherwise secured thereto, a hub 11 carrying the two sets of radial arms12 and 13, Figs. 3 and 4. Opposed to the arms 12 and 13 are the similararms 12' and 13', the said parts being connected together with a spacebetween, as indicated by Fig. '4. The arms 12 and 12 which project fromthe hub 11 may be formed as shown in Fig. 3 with a flange 14 on one ofsaid parts engaging a recess 15 in v the other, said parts beingconnected by suitable means such as the bolts 16, Fig. 4. Likewise, thearms 13 and 13, Fig. 3, are spaced apart and held in such spacedrelation by a boltI7 having a spacer or sleeve 18 against the ends ofwhich the inner surfaces of the arms 13 and 13 bear, as will more fullyappear,,: the construction being such that the series of arms or segmentplate portions 12,12, and 13, 13, form a series of box-like projectionsextending radially of the feed shaft 10.

Exterior of the arms or segment'portions 13 and 13-'are the .jawcarriers, which may conveniently be formed as'ring portions 19 havingradialarms 20 corresponding to-the arms or segment portions 13, 13 andprefer-.

ably secured I by the bolts 21' to, the arms of the hub 11, theconstruction being such that as the shaft 10 rotates, the series of thejaw carriers likewise rotate.

Between the jaw carriers 20 and the outer face of the arms or se ents13, 13 a re-' cess is formed, prefera ly in the jaw carriers 20, asindicated at 22, Fig. 4, for the reception of the jaws 23 ivotallymounted on the pins 24, Figs. 3 and 4, carried by the jaw carriers orarms 20. The jaws 23 are preferably arranged in pairs, two of such pairsforming the blank grasping means, although the number of such jaws maybe varied.

Referring to Fig. 4', it will be noted that while the bolts 17 serve tohold or brace the outer end portions of the jaw carriers 20, a sleeve 25extending between the inner faces of the jaw carriers serves to maintainthem a proper-distance apart to provide free movement of the jaws 23 intheir opening and closing movements, as will presently appear. In theform of invention shown, there are three sets of jaws, but it will beunderstood that the number may be varied to suit conditions of use.

The jaw operating means for opening and closing the jaws comprises aslide formed preferably of two members 25, 25 mounted in suitableguideways 26, 26, formed in the inner surfaces of the arms 13, 13, Fig.4. Between the members 25, 25 is a roll 27 adapted to bear upon theperipheral portion of a cam 28, and extending from one of the slidemembers 25, Fig. 4, is a pin 29 adapted to engage the cam path 30, theconstruction being such that upon relative ro tative movement of the camand slides 25, 25 about the axis of the feed shaft 10, the roll 27 willcause said slides to move outward and the pin 29 will cause them to moveinward in conformity with the shape of the respective cams 28 and 30.

The slides 25 carry projections 31, Fig. 3, on which are mounted the jawopening and closing pins 32, which engage slots or openings 33 in theadjacent jaws 23, the form of the said slots or openings 33 being suchthat upon outward movement of the slides 25 the pins 32 will cause thejaws to close and 1 on inward movement will cause the jaws to open tograsp and release the blank 34 respectively.

The grasping surface of the jaws 23 are appropriately formed to engage ablank, and in the present form of the invention the blanks are supposedto be of general cylindrical form. These blanks, however, will in Fig.3. That is to say, the pins 32 have a base portion 35 mounted in theprojections 31, said base 32 being eccentric with respect to the baseportions 35. In order to hold the pins 32 in adjusted position, suitablemeans are formed to lock the said pins in the projections 31.. the meansindicated by the form of the present invention being the clamping screws36 adapted to be seated against the cylindrical surface of the portion35 of said pins 32, the construction being such that upon loosening theclamping screws 36 the base portions 35 may be turned in the projections31 of the slides 25 to appropriately adjust the pins 32 in order thattheir cooperation with the slots 33 of the jaws may vary the opening andclosing movements of said jaws to suit blanks of different sizes. Inother words, the jaws 23 have a predetermined opening and closingmovement, and said predetermined opening and closing movement may bevaried by the adjustment of the pins 32 substantially as hereinbeforenoted.

As hereinbefore suggested, the feeding device of the present inventioncontemplates taking blanks from a source of supply, carrying them to aboring or drilling.

station, and holding them from rotary movement during the drilling orboring operation, and then to carry them to a turning station, whereafter the 'turni'ng centers have grasped the ends of the blank, the jawsrelease the blank and free it to rotative movement. Inasmuch as the awsmust hold the blank at the turning station until the turning centershave grasped the ends of the blank, special arrangement must be made foropening the jaws at that station while the jaws at the other stationsshall maintain their receiving or blank holding relations. To this endthe cam 28, Fig. 4, is mounted and fixed to rotate with a shaft 37, andwhen a pair of jaws holding a'blank has reached the blank turningstation indirated at the right, Fig. 3, and after the blank has beenbrought to rest between the turning centers and the centers have engagedthe ends of the blank the cam 28 is given a rotary movementcontra-clockwise, Fig. 3, to open the jaws and release the blank, theformation of the cams 28 and 30 being such that during this movement ofthe cam 28 the jaws at the receiving and at the boring or drillingstation remain in their receiving and blank holding relations. Thismovement of the cam 28 and its return to initial position is effectedthrough the mechanism best indicated by Fig. 2.

Mounted at 38, Fig. 2, on a bracket 39 se-- cured to the machine frameis a lever 40, the lower end being provided with a roll I1 engaging apath cam 42. Pivotally connected to the upper end of the lever 40 at 43is a cam operating arm 44:, the end of which is connected at 4.5 to anarm 46 secured to a cam operating shaft 37, Figs. 2 and 4, said shaft 37being the same shaft upon which the cam 28 is mounted, the constructionbeing such that .upon rotary movement of the shaft 3 carrying the pathcam 42 the cam 28 will be suitably moved through the shaft 37 to causethe jaws 23 at the blank turning station to be freed from theirengagement with the blank after the turning centers have engaged theends of said blank. It is desirable also that the jaws 23 at the turningstation, at the right, Fig. 3,

shall be drawn well back and to this end the path cam 30 has an abruptreentrant portion 47, Fig. 3, which, acting upon the pin 29 carried bythe slides 25, will cause the pins 32 to open the jaws 23 substantiallyas indicated in Fig. 3. When the blank has been turned the feed shaft 10is rotated and at the same time or approximately therewith, the cam 28is given a reverse movement, whereby the blank 34 at the receivingstation, at the top, Fig. 3, is engaged and graspedby the receiving jawsand upon r0- tation of the feed shaft the blank thus engaged is carriedto the boring or drilling station, while the blank formerly at theboring and drilling station at the left, Fig. 3, is carried to theturning station.

It is desirable that when the jaws grasp the blank and carry it to thevarious stations where it is to be treated, that they do not crush orinjure the surface of the blank, and to this end the shaft 37 carryingthe cam 28 is yieldingly mounted, so that upon actuation ofthe jawsthrough said cam, should said jaws engage and be resisted by the blank,the shaft will yield laterally to prevent undesirable crushing of theblank. As one means to this end the shaft 37 is loosely mounted in itsbearings 48, Fig. i, and is normally under the influence of the springs49 carried by the rods 50 and having the shoe 51 bearing upon the upperportion of the shaft 37 as best indicated in Figs. 2 and 4. The upperends of the springs -19 bear against suitable abutments 52 projectingfrom the standard 9, Fig. 2, the construction being such that after theblank has been grasped by the jaws, any crushing movement of the jawsabout the blank will react through the yielding shaft to prevent injuryto the blank.

The present invention contemplates, also,

an automatic supply of the blanks to the.

feeding device and one form of such means is well indicated by Fig. 2.In said figure, the blanks 34: are placed in a trough 53 pivotallymounted at 5% upon an arm 55 secured at 56 to the top of the standard 9.The trough 53 has an opening in its bottom through which projects a gate57 fixed to a stationary support 58 carried by the fixed arm 55 asindicated in Fig. 2, the construc- LOO isc

tion being such that the blanks 34 in the trough 53 will normally restwith the endmost blank against the gate 57. Secured to the trough 53 andprojecting therefrom is an operating arm 59 connected .to a link 60which is itself jointed at 61 to the upper end of a'lever 62 pivotallymounted at 63 to a bracket 64 secured to the machine frame. The lowerarm of the lever 62 is connected at 65 to alink 66 jointed at 67 to arocker arm 68 pivoted at 69 to the machine frame. The rocker arm 68 isprovided with the rolls 70 and 71, the latter being mounted on aprojecting arm 72 extending from the rocker arm 68. The rolls 70 and 71engage respectively the periphery of the cams 73 and 74, said cams beingappropriately formed-to positively move the rocker arm 68 in its twodirections of rocking movement, the construction being such that uponactuation of the rocker arm 68, the lever 62 and perforce the trough 53,will be raised and lowered about its pivotal axis at 54, thereby in itsupward movement raising the trough so that the endmost blank 34 may movedownward over the gate, which by such movement of the trough, is removedfrom the path of the blank. To insure delivery of a single blank, thereis mounted upon the machine frame at 75, a stop 76, said stop being sorelated to the trough and gate 57 that when the trough is raised and theblanks moved downward therein, the stop 76 obstructs the passage of theblanks, and as the trough is lowered the gate 57 passes between theendmost blank and the blank next adjacent thereto, thereby delivering,upon the downward movement of the trough, a blank 34 to the open jaws atthe receiving station of the feeder.

As hereinbefore indicated, when the blank is positioned at the boring ordrilling station, at the left, Fig. 3, it is held by the jaws froinrotation while the boring or drilling tools act upon the blank. Toassist in pre venting rotary movement of the blank at this time, thepresent invention contemplates blank -engaging means, which inconnection with the jaws, effectively prevent rotation of the blank. Inthe form of-the invention shown, this blank engaging means is in theform of pins or projections 77, Figs. 2 and 3, which are preferablymounted upon the lower portion of the lever 62, the construction beingsuch that when a blank is at the boring or drilling station the lever 62has been moved into position tocause the blank engaging pins 77 toengage the peripheral portions of the blank and effectively assist inpreventing rotation thereof. Of course it is obvious to those skilled inthe art that the details in many respects may be varied from thosedescribed, within the tru scope of the invention.

To rotate the feed shaft step-by-step, and

to hold it from rotary movement during the treating of the blanks, thepresent invention contemplates the feed shaft rotating means and a lock,which in the present form (if the invention, are best illustrated by Thefeed shaft 10 has secured thereto the combined ratchet and lock disk 78,Fig. 1, having the ratchet teeth 79 and the locking recesses 80, andloose upon the shaft is an arm 81 connected at its free end with a link82 which is itself jointed at 83 to the upper portion of a lever 84pivoted at 85and having an arm 86 provided with a roll 87 to engage acam path 88 in a suitable cam secured to the shaft 3, the constructionbeing such that upon rotation of the shaft 3 the lever 84 will be lockedupon its pivot 85 to thereby move the link 82 and the pawl 89 carried bythe free end of the arm 81 first in one and then in the oppositedirection, as will be readily understood. The pawl 89 is formed toengage the ratchet teeth 79 as the link 82-moves to the left and therebyrotate the feed shaft 10 an appropriate distance to carry the feed jawsfrom one station to the next succeeding station.

In order to lock the feed shaft from rotation when the blankshave beenmoved to their respective stations and are under treatment, there is alock arm 90, Fig. 1, adjustably pivoted at 91 in the slot 92 of abracket 93 secured to the standard 9, Fig. 1. The lock arm 90 is underthe influence of a spring 94, whereby the end.95 of said arm is normallyforced inward or to the left, Fig. l, to engage one of the lockingrecesses 80 in the disk 78.

In order to disengage the lock end 95 from the locking recess 80 as thelink 82 moves to the right and thereby permit rotary movement of thedisk 78 contra-clockwise, the end of the link 82 is provided with a camsurface 96, Fig. 1, which, upon movement of the link 82 to the right, isadapted to engage a projection or roll 97 on the lock arm 90 and therebydisengage the look from the disk, the construction being such that uponreverse movement of the link 82, the'disk will be turned sufficientlybefore disengagement from the pin or roll 97 to prevent reengagement ofthe lock end 95 with the locking recess so that a complete, fullmovement may be given to the feed shaft. When such feed movement hasbeen completed,

however, the spring 94, acting upon the lock pivot 99 by suitableoperating means such as the link 100, one end of which is con- 0 nectedat 101 to the lock arm 68 and the other end at 102 to a pin or otherprojection extending from the arm 103. The operating link 100 ispreferably formed so as to yield by means of a spring 104 and a sleeve105, the latter of which directly engages one of the pins 102 on the arm103, the construction being such that the knife carrier may beyieldingly moved to position the knives for the turning operation.

Changes, of course, may be made in the details of structure of thevarious features hereinbefore described, without departing from the truescope of the actual invention, which is definitely set forth by theclaims.

\Vhat is claimed is 1. The combination of a plurality of spaced meansfor treating a blank, of a rotatable feeder disposed between said spacedmeans and comprising a plurality of sets of blank engaging jaws, asource of blank supply, means including a slide movable radially withrelation to the feeder and connected to each jaw of a set for causingthe jaws to engage and carry a blank to one of said spaced means andhold it during treat ment thereby and then to move the blank to anotherof said spaced means, and for causing the jaws adjacent the lastmentioned means to hold the blank until the last men'-.

ply, means including a slide movable radially of the feeder and engagingboth jaws of a set for causing the jaws to engage .and carry a blank toone of said spaced means and hold it during treatment thereby,

, and then to move the blank to another of said spaced means, means inaddition to the jaws to engage the blank while being treated by thefirst mentioned means to. assist in preventing rotation of said blank,and means for holding the slide from radial movement when the jaws areadjacent the means for the second treatment of the blank to hold theblank until the first mentioned means has taken control of the blank,and to then move the slide radially to release said jaws from the blankwhile maintaining the jaws adjacent the first mentioned means in holdingrelation with the blank there being treated.

' 3. The combination of aplurality of spaced means for treating a blank,of dill.

a rotatable feeder carrying pairs of pivotally mounted jaws, a slidemovable radially of the feeder and connected to each jaw of a pair, acam mounted concentrically of the feeder acting-upon the slide to lockboth jaws in blank holding position until after one of said means hastaken control of the blank and thereafter withdrawing the slide radiallyof the feeder to separate and move both jaws away from the blank.

1. The combination of a plurality of spaced means for treating a blank,of a rotatable feeder having pairs of pivotally .mounted jaws, a slidemovable radially of the feeder, a pin and slot connection between theslide and each jaw of a pair, and a cam mounted concentrically of thefeeder for locking the jaws in blank holding relation until one of saidmeans has taken control of the blank and then moving the slide radiallyto release the blank.

5. The combination of a plurality of spaced means for treating a blank,of a feeder comprising jaws for engaging a blank and carrying itsuccessively to said spaced means, means for closing and opening thejaws, said jaw closing and opening means comprising a yieldingly mountedshaft, and a cam mounted on said shaft and having operating engagementwith the jaws of the feeder.

6. The combination of a plurality of spaced means for treating a blank,of a feed shaft carrying a series of arms, jaws pivotally mounted onsaid arms for engaging a blank, a cam mounted for yielding movement in adirection transversely of its axis, means for turning the feed shaft tocarry the jaws into position for treatment at two of the stations, aslide connected to the jaws and yieldingly operated by the cam as thefeed shaft is rotated for closing said jaws, and means for operating thecam for opening the jaws at the station Where the blank is last treated.

7. The combination of a plurality of spaced means for treating a blank,of a feeder comprising a shaft, arms carried by said shaft, jawspivotally mounted on said arms, jaws operating slides, a cam shaftindependent of the feeder shaft carrying a jaw slide operating cam,means for turning the feed shaft relatively to the said cam for causingthe latter to close the jaws, means for moving the cam independent offeed shaft movement for opening the jaws at one of said means, said cambeing laterally movable to prevent injury to the blank by the aws.

8. The combination of tools 7 for acting upon a blank, a feeder forpresenting the blanks to said tools, said feeder comprising a feedshaft, radial arms carried by said shaft, jaws pivotally mounted on saidarms and provided with slotted portions, a slide movable radially of thefeed shaft and having .pins engaging said slotted portions of forclosing and opening movement to engage and release a blank, said jawseach being provided with a slot, a slide having pins engaging saidslots, said pins being ad ustable to suit blanks of differentsizes,'means for clamping the pins in adjusted position, a cam foroperating said slide, and means for rotating the feed shaft.

10. In amachine of the character described, the combination of a feedshaft, a

ating member for opening and closing said jaws, a cam, means for turningthe feed shaft relative to said cam to cause the jaws to hold and carrya blank from one station to another, a cam shaft carryin said camindependent of the feed shaft, sai i cam shaft being yieldingly mountedfor lateral movement, and means for rocking the cam to cause the'jaws atone of said stations to release the blank while the jaws at the otherstations remainunaifected by movement of said cam.

Intestimony whereof, I have signed my name to this specification, in thepresence of twosubscribing witnesses.

I 1 WILLIAM C. FARNUM. Witnesses:

ELLIOT S. TUcKnn,

' v ARTHUR F. EVANS.

